.topbar
  height var(--topbar-height)
  width 100%
  z-index 101
  flex none
  display flex
  align-items stretch
  justify-content space-between
  background-color #fff
  border-bottom 1px solid rgba(#000, 0.1)
  user-select none
  position sticky
  top 0

  &__button
    &:hover
      background-color var(--grape_0)

  &__group
    display flex
    align-items stretch

  &__section
    display flex
    padding 0 8px
    align-items center
    box-sizing border-box

    &_flat
      padding 0

    & + &
      border-left 1px solid rgba(#000, 0.1)
  &_newLabelingUI
    display block
    background-color #FAFAFA
    height 42px
    border-bottom #D8D5DD 1px solid

    .topbar
      &__group
        height 42px
        flex 1
        align-items center
